2-hydroxy-6-aminonaphthalene-4-sulfonic acid, 2-amino-6-hydroxynaphthalene-8-sulfonic acid, EINECS 201-686-6, 2-amino-6-hydroxynaphthalene-8-sulphonic acid, 7-Amino-3-hydroxy-naphthalin-1-sulfonsaeure, 6-Amino-naphthol-(2)-sulfonsaeure-(4), 2-hydroxy-6-aminonaphthalene-4-sulphonic acid, 7-amino-3-hydroxy-naphthalene-1-sulfonic acid